All about Data Blending in Tableau Prerequisites for data blending Differences between joins and data blending Blend your data Data blending limitations Data blending is a method for combining data that supplements a table of data from one data source with columns of data from another data source. Usually you use joins to perform this kind of data combining, but there are times, depending on factors like the type of data and its granularity, when it's better to use data blending. For example, suppose you have transactional data stored in Salesforce and quota data stored in an Excel workbook. The data you want to combine is stored in different databases, and the granularity of the data captured in each table is different in the two data sources, so data blending is the best way to combine this data. Data blending is useful under the following conditions: You want to combine data from different databases that are not supported by cross-database joins. Cro...